CVE-2026-125391— Webmin through 2.670 OS Command Injection via Samba User Account Options

Quick assessment

Affected

webmin webmin

Exploitation

No confirmed in-the-wild exploitation; assess based on exposure

Recommended action

Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Webmin 2.670 及以下版本在中存在操作系统命令注入漏洞。已认证的 Samba 用户管理员可通过未经验证的参数注入命令。攻击者可在和传递的账户选项标志中嵌入 shell 元字符，利用函数以 root 权限执行任意命令。

CVSS 7.2 · High Updated Nov 10, 2026

Possible ATT&CK Techniques 1 AI

T1190.006

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Vulnerability Information

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Vulnerability Title

Webmin through 2.670 OS Command Injection via Samba User Account Options

Source: CVE Program / CVE List V5

Vulnerability Description

Webmin through 2.670 contains an OS command injection vulnerability in samba/save_euser.cgi that allows authenticated Samba user maintainers to inject commands via unvalidated opts parameter. Attackers can embed shell metacharacters in account option flags passed by create_user and modify_user to backquote_logged, executing commands as root.

Source: CVE Program / CVE List V5

CVSS Information

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Source: CVE Program / CVE List V5

Vulnerability Type

OS命令中使用的特殊元素转义处理不恰当(OS命令注入)

Source: CVE Program / CVE List V5

Affected Products

Vendor	Product	Affected Versions	CPE	Subscribe
webmin	webmin	0 ~ 2.670	-

II. Public POCs for CVE-2026-125391

#	POC Description	Source Link	Shenlong Link

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III. Intelligence Information for CVE-2026-125391

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Other References for CVE-2026-125391 (3)

https://github.com/webmin/webmin/blob/2.670/samba/samba-lib.pl#L658 technical-description
https://github.com/webmin/webmin/commit/18cab89b1fc74ab7e8b1b8b90bbccbe5aba99154 patch
https://www.vulncheck.com/advisories/webmin-through-2.670-os-command-injection-via-samba-user-account-options third-party-advisory

https://www.cve.org/CVERecord?id=CVE-2026-125391

IV. Related Vulnerabilities

Same product: webmin

Same vendor: webmin

Same weakness: CWE-78